Shedding mechanism for looms for weaving



Oct. 16, 1928. J. H. HlNDLE ET AL SHEDDING MECHANISM FOR LOOMS FORWEAVING Filed Aug. 51, 1927 2 Sheets-Sheet 1 l l 3 m a a a A J. H.HlNDLE ET AL SHEB'EING MECHANISM FOR LOOKS FOR WEAVING Oct. 16, 1928.

2 Sheets-Sheet 2 Filed Aug. 31, 1927 mvENTo'Rs.

Am W I I Patented ea. 16, 1928.

UNITED STATES PATENT OFFICE.

SHEDDING MECHANISM FOR LOOMS FOR WEAVING.

Application filed August 31, 1927, Serial No. 216,678, and in GreatBritain October 12, 1926.

This invention relates to a tappet or shedding motion for looms moreparticularly applicable to looms for weaving heavy multiple ply fabrics.

According to the invention the tappets or cams are mounted transversely,on a shaft or drum at right angles to the longitudinal axis of the loom,each tappet ismachined from steel plate with a cam groove on both sidesand the tappet levers are mounted aboveand Fig. 3 is a side elevation oftappet or cam and tappet levers.

The tappets or cams A and the tappet levers B are mounted in a frame Cand disposed transversely to the longitudinal axis of the loom andconstituting a separate unit capable of being detached from the loomWithout disturbing or displacing other parts of the mechanism.

The tappet-s A are fitted on a central shaft D and drum (Z at rightangles to the longitudinal axis of the loom rotating in bearings in theframe C and driven by bevel gearing e on the end of the crank shaft Eand spur gears (Z (Z on counter-shafts d gearing with pinion (Z mountedin bearings in the lower frame C with suitable change wheels to vary thespeed of t ie tappets to suit requirements. The tappet levers B arepivoted on studs .7) which also serve as stays or distance pieces boltedbetween the frames 0.

The frame C is permanently bolted to the loom gable C and to the fiooror sole plate and the tappet frameC stands upon the lower frames C beingdetachably bolted thereto and to the loom gable, G to provide for itsremoval without disturbing the lower frame or the counter-shafts andgears mounted therein.

Each intermediate tappet or cam A is maboth sides that suflice, threeintermediate or chined from steel on one side to operatethe plate withcam grooves a on upper set of tappet levers B and that on the i otherside to operate the lower set of ta levers B. The tappets A beingmachined from steel plate may be made very thin and set close together awasher or distance piece a on the central drum separating one from theother.

Each tappet lever B-B is constructed with a boss 6 at its pivoted endand at or near its centre carries a bowl or runner b to enter the camgroove a in one side of the tappet A the bowl'being preferably mountedon ball bearings. The tappet levers B, B pass between the tappets and tothe free ends linksand chains are connected the chains passing overpulleys 7' along the top and bottom of the loom to connect with thehealds or shafts. the

pet

' connections between the levers and chains being easily detachable.

By this construction the tappets A- and tappet leversB with theirframeCand driving pinion d form a unit readily detachable and the numberof tappets are reduced nearly by half so that for eight healds, fivetappets central ones with two grooves each and two outside. ones, fourtappet levers being pivoted towards the upper part f the tappets andfour towards the lower part.

What we claim as our invention and desire to protect by Letters Patentis 1. A shedding motion for looms comprising tappets, having cam grooveson both sides, mounted transversely ofthe loom, a shaft at right anglesto the longitudinal axis upon which the tappets are mounted, tappetlevers mounted above and below the tappet shaft, the upper leversengaging and being operated by the cam grooves on one side of thetappets, and the lower levers engaging and being operated by the camgrooves on the other side of the tappets.

2. A shedding motion for looms as in claim v 1 constructed as a separatedetachable unit.

In testimony whereof we have hereunto set

